How to control Samsung DeX screen with a device?

Last Update Date : Oct 30. 2019

Samsung DeX is a service that allows you to use your smartphone like a computer by connecting the smartphone to an external display, such as a TV or monitor. While using Samsung DeX, you can simultaneously use your smartphone.

Controlling with an external keyboard and mouse

You can use a wireless keyboard/mouse. Refer to the respective device’s manual for more information.
• You can set the mouse pointer to flow from the external display to the smartphone’s screen. Launch the Settings app, select Samsung DeX → Mouse/trackpad, and then select the Flow pointer to phone screen switch to activate it.
• You can also use the external keyboard on the smartphone’s screen.

Using your mobile as a touchpad

You can use your device’s screen as a touchpad and operate it with your fingers or the S Pen. On your smartphone, drag downwards from the top  of the screen to open the notification panel and tap Use your phone as a touchpad.


ㆍYou can use the touchpad only when using Samsung DeX mode.

ㆍIf your smartphone’s case has a front cover, open it to use your smartphone as a touchpad. If the front cover is closed, touchpad may not work properly.

ㆍIf your smartphone’s screen turns off, press the Power key to turn on the screen.

Samsung Dex

Orienting the touchpad

When you are using smartphone as a touchpad, you can use it in either the horizontal or vertical alignment. To rotate the touchpad, rotate the smartphone or double-tap 

orienting the touchpad

Using smartphone while using the touchpad 

You can use apps on your smartphone even while it is being used as a touchpad.

Hard press the Home button area to move to the Home screen and select apps you want to use.

Writing or drawing on the touchpad with the S Pen

You can handwrite or draw on the touchpad with the S Pen. Rotate the touchpad to the landscape orientation and detach the S Pen from your device. The S Pen drawing pad will appear on the touchpad.

Using the screen keyboard

When you enter text to send messages, create notes, or perform other tasks, a screen keyboard will appear automatically on your smartphone’s screen without connecting an external keyboard. If the keyboard does not appear, select keyboard icon on the quick access toolbar.

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